<template>
	<view>
		<!-- 使用自定义的搜索组件 -->
		<!-- <my-search :bgcolor="'black'" :radius="3"></my-search> -->
		<my-search @click="gotoSearch" ></my-search>
		
		<view class="scroll-view-container">
			<!-- 左侧的滑动区域 -->
			<scroll-view  class="left-scroll-view"scroll-y="true" :style="{height: wh + 'px'}">
				<block v-for="(item, i) in cateList" :key="i">
				  <view :class="['left-scroll-view-item',i === active?'active':'']" @click="activeChanged(i)">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			<!-- 右侧的滑动区域 -->
			<scroll-view scroll-y="true" :style="{height: wh + 'px'}" :scroll-top="scrollTop">
				
				<view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
				    <!-- 二级分类的标题 -->
					<view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
					<!-- 当前二级分类下的三级分类列表 -->
					<view class="cate-lv3-list">
						<!-- 三级分类的item项 --> 
						<view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							<!-- 三级分类的图片 -->
							<image :src="item3.cat_icon" ></image>
							<!-- 三级分类的文本 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
				
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins:[badgeMix],
		data() {
			return {
				// 当前设备可用的高度
				wh:0,
				cateList:[],
				active:0,
				cateLevel2:[],
				scrollTop:0
			};
		},
		onLoad() {
			const sysInfo=uni.getSystemInfoSync()
			// console.log(sysInfo.windowHeight)
			this.wh=sysInfo.windowHeight-50
			
			this.getCateList()
		},
		methods:{
			async getCateList() {
			    // 发起请求
			    const { data: res } = await uni.$http.get('/api/public/v1/categories')
			    // 判断是否获取失败
			    if (res.meta.status !== 200) return uni.$showMsg()
			    // 转存数据
			    this.cateList = res.message
				console.log(res.message)
				this.cateLevel2=res.message[0].children
			  },
			  activeChanged(i){
				  this.active=i
				  //重新为二级分类赋值
				  this.cateLevel2 = this.cateList[i].children
				  
				  this.scrollTop=this.scrollTop===0?1:0
			  },
			  
			  //跳转到商品列表页面
			  gotoGoodsList(item){
				  uni.navigateTo({
				  	url:'/subpkg/goods_list/goods_list?cid='+item.cat_id
				  })
			  },
				  
			  gotoSearch(){
				 uni.navigateTo({
				 	url:"/subpkg/search/search"
				 })
			  },
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
	.left-scroll-view{
		width: 120px;
		
		.left-scroll-view-item {
			background-color:#F7F7F7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
			
		 &.active {
		        background-color: #ffffff;
		        position: relative;
				
	 // 渲染激活项左侧的红色指示边线
			&::before {
			  content: ' ';
			  display: block;
			  width: 3px;
			  height: 30px;
			  background-color: #c00000;
			  position: absolute;
			  left: 0;
			  top: 50%;
			  transform: translateY(-50%);
			}
			}
		}
	}
}
	.cate-lv2-title {
	  font-size: 12px;
	  font-weight: bold;
	  text-align: center;
	  padding: 15px 0;
	}
	
	.cate-lv3-list{
		display: flex;
		flex-wrap: wrap;
		.cate-lv3-item{
			width: 33.33%;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			margin-bottom: 10px;
			image{
				width: 60px;
				height: 60px;
			}
			text{
				font-size: 12px;
			}
		}
	}
</style>
